Exam 642-883 Question id=3452 BGP Routing in Service Provider Environments

Referring to the partial Cisco IOS-XR BGP configuration exhibit, when trying to commit this configuration, the following error is displayed:
% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errors.
router bgp 65111 ! neighbor 10.1.1.1 remote-as 65111 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 2001:db8:10:1:1::1 remote-as 65111 update-source Loopback0 address-family ipv6 unicast
What is wrong with the configuration?

A. IPv6 unicast routing has not been enabled globally using the ipv6 unicast-routing command
B. The configuration is missing the required network command
C. The update-source loopback 0 commands must be configured under the respective neighbor address-family
D. The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast commands under router bgp 65111

WARNING

the answers are mixed, do not specify in the comment number or the letter of the answer
please write answer#A instead A, answer#B instead B...
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